The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 2010
Filed:
Dec. 18, 2006
Shengqi Yang, Chandler, AZ (US);
Tiehan LU, Chandler, AZ (US);
Shengqi Yang, Chandler, AZ (US);
Tiehan Lu, Chandler, AZ (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
Various embodiments for image contrast enhancement are described. In one or more embodiments, adaptive contrast enhancement may be realized by performing local standard deviation (LSD) based histogram equalization. In such embodiments, luminance (Y) values of an image may be grouped into one of several luminance regions, with each luminance region defining an LSD threshold. An LSD value may be calculated for each pixel within a particular luminance region and then compared to the LSD threshold for the particular luminance region. If the calculated LSD value for a pixel is smaller that the defined LSD threshold, then the pixel is not counted as a population for histogram equalization calculation. Otherwise, the pixel is counted as one population. Other embodiments are described and claimed.